Finding the Fourth Proportional to 87,951.80, 121,367.48 and 56,117.18
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Solution
The fourth proportional to 87,951.80, 121,367.48 and 56,117.18 is: 77,437.88
Step by Step Solution
- Step 1: Write the proportion equation
87,951.80 : 121,367.48 = 56,117.18 : x - Step 2: Convert to fraction form
87,951.80/121,367.48 = 56,117.18/x - Step 3: Cross multiply
87,951.80x = 121,367.48 × 56,117.18 - Step 4: Simplify right side
87,951.80x = 6,810,800,721.31 - Step 5: Solve for x
x = 6,810,800,721.31/87,951.80 - Step 6: Final answer
x = 77,437.88
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.